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Title:
VARIABLE VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE AND VARIABLE VALVE MECHANISM CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/159298
Kind Code:
A1
Abstract:
During cold start-up of an internal combustion engine, an intake valve variable mechanism sets an intake valve opening timing (IVOc) to the retarded side of the exhaust top dead center by a predetermined angle (ITc) so as to be between the advanced side of the maximum retarded opening timing (IVOrtd) and the retarded side of the maximum advanced opening timing (IVOadv), and an exhaust valve variable mechanism sets an exhaust valve closing timing (EVCc) to the advanced side of the exhaust top dead center by a predetermined angle (ETc) so as to be between the retarded side of the maximum advanced closing timing (EVCadv) and the advanced side of the maximum retarded closing timing (EVCrtd), thereby forming a "negative valve overlap" (NVOc) where the intake valve opening timing (IVOc) and the exhaust valve closing timing (EVCc) do not overlap with each other.

Inventors:
NAKAMURA, Makoto (4-7-1, Onna, Atsugi-sh, Kanagawa 10, 〒2438510, JP)
Application Number:
JP2018/005157
Publication Date:
September 07, 2018
Filing Date:
February 15, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F02D13/02; F02D21/08; F02D41/06; F02M26/01
Foreign References:
JP2009156029A2009-07-16
JP2010209859A2010-09-24
JP2001355464A2001-12-26
JP2008088874A2008-04-17
JP2008088875A2008-04-17
JP2008267300A2008-11-06
Attorney, Agent or Firm:
ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)
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